what is subsidiary alliance????
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Answer:
If possible, let us assume 2+5 is a rational number.
2+5=qp where p,q∈z,q=0
2−qp=−5
q2q−p=−5
⇒−5 is a rational number
∵q2q−p is a rational number
But −5 is not a rational number.
∴ Our supposition 2+5 is a rational number is wrong.
⇒2+5 is an irrational number.